function sprawdz(id) {
 if (navigator.appName=="Microsoft Internet Explorer") { 
    if (document.all[id].style.visibility == 'visible') {
          document.all[id].style.visibility = 'hidden';
          document.all[id].style.display = 'none';
    }
    else {
       document.all[id].style.visibility = 'visible';
       document.all[id].style.display = 'block';
    }
 }
 else { 
  
    if (document.getElementById(id).style.visibility == 'visible') {
        document.getElementById(id).style.visibility = 'hidden';
        document.getElementById(id).style.display = 'none';
    }
    else {
       document.getElementById(id).style.visibility = 'visible';
       document.getElementById(id).style.display = 'block';
    }
 }
}

function wstawobiektflash(nazwa,szerokosc,wysokosc) {
document.write('<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0" width="'+szerokosc+'" height="'+wysokosc+'" id="testNaStr" align="middle">');
document.write('<param name="allowScriptAccess" value="sameDomain" />');
document.write('<param name="movie" value="'+nazwa+'" />');
document.write('<param name="quality" value="high" />');
document.write('<param name="wmode" value="opaque" />');
document.write('<param name="bgcolor" value="#ffffff" />');
document.write('<embed wmode="opaque" src="'+nazwa+'" quality="high" bgcolor="#ffffff" width="'+szerokosc+'" height="'+wysokosc+'" name="testNaStr" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />');
document.write('</object>');
}

function wstawobiektflash_2(nazwa,szerokosc,wysokosc,lang,art) {
document.write('<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0" width="'+szerokosc+'" height="'+wysokosc+'" id="testNaStr" align="middle">');
document.write('<param name="allowScriptAccess" value="sameDomain" />');
document.write('<param name="movie" value="'+nazwa+'" />');
document.write('<param name="quality" value="high" />');
document.write('<param name="wmode" value="transparent" />');
document.write('<param name="bgcolor" value="#ffffff" />');
document.write('<param name="FlashVars" value="jezyk='+lang+'&strona='+art+'" />');
document.write('<embed FlashVars="jezyk='+lang+'&strona='+art+'" wmode="transparent" src="'+nazwa+'" quality="high" bgcolor="#ffffff" width="'+szerokosc+'" height="'+wysokosc+'" name="testNaStr" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />');
document.write('</object>');
}

function checkform_kontakt (form){
 if (form.zgoda.checked==false){
   alert("Proszę wyrazić zgodę na przetwarzanie danych osobowych!");
   return false;
 } 
 if (form.email.value==''){
   alert("Proszę podać adres e-mail!");
   return false;
 }
 if(form.email.value!=''){
    var wzor_adres = /^([\w\.+_\-]+)@([\w\.\-_]+)\.([a-z]{2,6})$/; 
    var str_adres = form.email.value; 
    if(!(wzor_adres.test(str_adres))){
      alert('"' + str_adres + '" to nie jest poprawny adres e-mail!');
      return false;
    }
   if (form.tresczapytania.value==''){
   alert("Proszę wpisać wiadomosć!");
   return false;
   }
 }
 form.submit();
}

function over(id,num){
      if(num==1){
          var lang="";
       }
       else if(num==2){
          var lang="en_";
       }
       else if(num==3){
          var lang="de_";
       }
       else if(num==4){
          var lang="ru_";
       }
       var id_name="element_"+id;
       elem = document.getElementById(id_name);
       elem.src = "images/"+lang+"menu_over_" + id + ".png"; 
    }
function out(id,num){
       if(num==1){
          var lang="";
       }
       else if(num==2){
          var lang="en_";
       }
       else if(num==3){
          var lang="de_";
       }
       else if(num==4){
          var lang="ru_";
       }
       var id_name="element_"+id;
       elem = document.getElementById(id_name);
       elem.src = "images/"+lang+"menu_out_" + id + ".png"; 
}